Plough blade arrangement

Abstract

The object of the invention is a plough blade arrangement, advantageously in a snow-plough, which plough (1) is intended to be attached to a vehicle, advantageously a tractor or lorry. The plough blade arrangement includes a frame (2) consisting of a flat part removably attached to the plough (1), several blade plates (4) covering the desired working width, and attachment members for the blade plates (4) to the frame (2). The aforesaid attachment members consist of flexible members (3), which are arranged to permit the movement of the blade plates (4) essentially in only one direction in the direction of the surface of the frame (2) when the blade plate (4) strikes an obstacle or pit. In addition, the working width is divided into separate, independently flexible parts.

I claim: 
     
       1. A plough blade arrangement intended to be attached to a vehicle, the plough blade arrangement including a frame including a flat part removably and rigidly attached to a plough, several blade plates covering a desired working width and divided into separate and independent parts, and flexible attachment members for securing the blade plates to the frame and comprising flexible elastomeric material bonded between the frame and the blade plates, characterized in that each flexible member comprises an elastomeric plate having essentially an even thickness and directly opposite parallel surfaces, with one of said surfaces adherently fixed on a surface of the frame and the opposite of said surfaces adherently fixed on a frame-opposing parallel surface of the blade plate and each flexible member has a thickness at most 1/4 of its height to permit the movement of the blade plates essentially in a direction parallel with said surface of the frame when the blade plate strikes an obstacle or pit wherein the arrangement includes a stop, which limits the movement of the blade plate. 
     
     
       2. A plough blade arrangement in accordance with claim 1, characterized in that the stop is made flexible in such a way that when the blade plate approaches the extreme position, its movement demands increasing force. 
     
     
       3. A plough blade arrangement in accordance with claim 2 characterized by slide members, which force the blade plate to move only along a desired track. 
     
     
       4. A plough blade arrangement in accordance with claim 1, characterized in that the arrangement includes several separate flexible elements, each one of which includes a frame, a flexible member, and a blade plate. 
     
     
       5. A plough blade arrangement in accordance with claim 4 characterized by slide members, which force the blade plate to move only along a desired track. 
     
     
       6. A plough blade arrangement in accordance with claim 1, characterized by slide members, which force the blade plate to move only along a desired track. 
     
     
       7. A plough blade arrangement in accordance with claim 1 characterized in that the arrangement includes several separate flexible elements, each one of which includes a frame, a flexible member, and a blade plate. 
     
     
       8. A plough blade arrangement in accordance with claim 7 characterized by slide members, which force the blade plate to move only along a desired track. 
     
     
       9. A plough blade arrangement in accordance with claim 1 characterized by slide members, which force the blade plate to move only along a desired track. 
     
     
       10. A plough blade arrangement in accordance with claim 1 characterized in that each flexible member has a thickness in the range of 1/10 to 1/5 of its height. 
     
     
       11. A plough blade arrangement in accordance with claim 1 characterized in that the working width of the independently flexible blades is not more than 1 m. 
     
     
       12. A plough blade arrangement in accordance with claim 11 wherein said thickness of each flexible member is in the range of 1/10 to 1/5 of its height. 
     
     
       13. A plough blade arrangement in accordance with claim 1 characterized in that the working width of the independently flexible blade plates is in the range of 40-80 cm. 
     
     
       14. A plough blade arrangement in accordance with claim 12 characterized in that each flexible member has a thickness in the range of 1/10 to 1/5 of its height. 
     
     
       15. A plough blade arrangement in accordance with claim 1 characterized in that at least one of the frame and the blade plate includes attachment holes for receiving fasteners, and installation openings aligned with said installation openings in the flexible member and the opposite one of the frame and blade plate.